export type StudioProtocolTarget = {
    readonly id: string;
    readonly expiresAt: number;
    readonly lastFocusedAt: number;
};
export type StudioProtocolInstallTarget = StudioProtocolTarget & {
    readonly compositionId: string;
};
export type StudioProtocolInstallCapability = {
    readonly type: 'install-element';
    readonly payloadType: 'remotion-element';
    readonly payloadVersions: readonly number[];
    readonly target: StudioProtocolInstallTarget | null;
};
export type StudioProtocolSetLicenseKeyCapability = {
    readonly type: 'set-license-key';
    readonly target: StudioProtocolTarget | null;
};
export type StudioProtocolAddElementLibraryCapability = {
    readonly type: 'add-element-library';
    readonly target: StudioProtocolTarget | null;
};
export type StudioProtocolCapability = StudioProtocolInstallCapability | StudioProtocolSetLicenseKeyCapability | StudioProtocolAddElementLibraryCapability;
export type StudioProtocolDescriptor = {
    readonly protocol: 'remotion-studio-protocol';
    readonly protocolVersion: 1;
    readonly studioVersion: string;
    readonly projectName: string | null;
    readonly capabilities: readonly StudioProtocolCapability[];
};
export type StudioProtocolFetcher = (input: string | URL | Request, options?: RequestInit) => Promise<Response>;
export type StudioProtocolDiscoveryDependencies = {
    readonly fetchFn: StudioProtocolFetcher;
    readonly now: () => number;
    readonly ports: readonly number[];
};
export declare const studioProtocolProbePorts: number[];
export declare const focusedStudioMaxAge: number;
export declare const fetchWithTimeout: ({ fetchFn, options, url, }: {
    readonly fetchFn: StudioProtocolFetcher;
    readonly options: RequestInit | null;
    readonly url: string;
}) => Promise<Response>;
export declare const isStudioProtocolDescriptor: (value: unknown) => value is StudioProtocolDescriptor;
export declare const parseStudioProtocolDescriptor: (value: unknown) => StudioProtocolDescriptor | null;
export declare const getInstallCapability: (descriptor: StudioProtocolDescriptor) => StudioProtocolInstallCapability | null;
export declare const getSetLicenseKeyCapability: (descriptor: StudioProtocolDescriptor) => StudioProtocolSetLicenseKeyCapability | null;
export declare const getAddElementLibraryCapability: (descriptor: StudioProtocolDescriptor) => StudioProtocolAddElementLibraryCapability | null;
export type DiscoveredStudio = {
    readonly descriptor: StudioProtocolDescriptor;
    readonly discoveredAt: number;
    readonly origin: string;
};
export declare const discoverStudios: (dependencies: StudioProtocolDiscoveryDependencies) => Promise<{
    readonly studios: DiscoveredStudio[];
    readonly foundUnsupportedProtocol: boolean;
    readonly foundInvalidResponse: boolean;
}>;
export declare const isAbortError: (error: unknown) => boolean;